Media assets are the dominant source of bandwidth cost and Largest Contentful Paint regressions on modern web platforms.
This site covers the full delivery stack: choosing between AVIF, WebP, and legacy JPEG; tuning AV1, VP9, and H.265 encode pipelines;
configuring Cache-Control and Vary: Accept headers correctly on CDNs; and writing srcset/sizes
attributes that actually reflect your layout breakpoints.
Coverage runs the whole path from source asset to painted pixel: encoding and format choice, responsive markup, lazy loading and fetch priorities, CDN and edge delivery (Cloudflare Image Resizing, AWS CloudFront cache behaviors, Fastly VCL negotiation), framework and build-tool integration (next/image, Nuxt, Vite, Astro), and the monitoring that catches media regressions before they ship.
Every guide targets engineers who need depth — benchmark tables, runnable CLI and HTML snippets, browser compatibility matrices (Safari 14/16, Chrome 85+, Firefox 93+, Edge 18+), and explicit tradeoff callouts rather than generic best-practice summaries.
Site Sections
Core Media Fundamentals & Next-Gen Formats
Codec selection, compression benchmarks, MIME type configuration, cache-control strategies, and video codec theory covering AVIF, WebP, AV1, VP9, and H.265.
Lazy Loading, Preloading & Fetch Priorities
Native lazy loading, IntersectionObserver patterns, preload vs prefetch decisions, and fetchpriority tuning for LCP images and critical video.
Responsive Image & Video Delivery
Mastering srcset and sizes, art direction with <picture>, CSS container queries for dynamic media sizing, and framework integration for Next.js and React.
CDN & Edge Media Delivery
Edge image transformation and cache-key design across Cloudflare, AWS CloudFront, and Fastly — plus Vary: Accept negotiation and media performance monitoring.
Framework & Build-Tool Media Integration
Wiring optimized media into modern frameworks and build pipelines: the Next.js Image component, @nuxt/image and Vite, and Astro's <Image>/<Picture> components.
Start Here
If you are new to the site, these pages cover the highest-leverage decisions in a modern media delivery pipeline:
- AVIF vs WebP — benchmark data and when to use each
- Configuring AVIF fallbacks for Safari 14
- Setting max-age on CDN media assets
- fetchpriority for LCP image optimisation
- When to use rel=preconnect for CDN origins
- Calculating optimal sizes attribute values
- Using next/image with custom loader configurations
- Debugging incorrect Content-Type headers for WebM
- Configuring Cloudflare Image Resizing URL parameters
- Enforcing image-weight budgets with Lighthouse CI
- Optimizing images with the Next.js Image component